This centre cap is made from tough impact, heat and chemical-resistant plastic that can easily be painted, which will make them look even better and also help them to be more resistant to the elements.
DIY spray can painting is simple and can have great results if done correctly.
First you mask up the area where the O-ring is, as you don't want to paint that.
Plastic primer goes on next, we recommend Tamiya spray can.
Then apply paint colour of choice, again we recommend Tamiya as they are the best quality and finish with a massive range of colours available.
Clear coat to finish will add some depth and extra protection, Tamiya have this covered also.
Or, alternatively, you can take it to your local car painter, tell him its plastic and have them paint it in 2K for the ultimate paint finish.